|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||354/25 ; 356/4|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 5 인용 특허 : 1|
A distance information judging circuit for focus detecting apparatus comprises memory means for storing a distance information signal obtained from the focus detecting apparatus for each scan of an optical system,, and coincidence signal generating means adapted for comparing the distance information signal obtained from the focus detecting apparatus in a succeeding scan of the optical system with the distance information signal stored in the memory means and for generating a coincidence signal when the distance information signals coincide each other.
A distance information judging circuit responsive to the distance information signals produced by a focus detecting apparatus in an optical system for providing a distance information signal corresponding to the focused position of the optical system, comprising: means for scanning the optical system between an infinite focal position and a minimum focal position; memory means for storing a first distance information signal obtained from said focus detecting apparatus during a first scan of said optical system; and coincidence signal generating means for...